Supercharging a 1985 944 N/A - POSITIVE FEEDBACK ONLY!
#31
Rennlist Member
even old ones of those still command a huge price tag, if you can find one.
an M90 is a $100 supercharger at junkyards and takes another $100 to rebuild one.
to me at least the real attraction of the roots-type is the instant response and low/mid range power gains achievable.
a 944 is in desperate need of low-end power, IMO...so this is an easy way to get there.
an M90 is a $100 supercharger at junkyards and takes another $100 to rebuild one.
to me at least the real attraction of the roots-type is the instant response and low/mid range power gains achievable.
a 944 is in desperate need of low-end power, IMO...so this is an easy way to get there.
#32
Three Wheelin'
It will be fine provided that fuel and spark are controlled and dialed in properly.
Most installations just slap in a power adder but do not address management properly or more precisely, not at all.
#33
Rennlist Member
The centrifugal superchargers look like a great idea, but you have to remember that they're not positive displacement. You won't have boost off the line.
Spencer...PM me how much you're looking to get for those M90 parts, intake and all. I'm just curious more than anything, the NA motor is running perfectly and I need to shoot myself in the foot somehow.
Spencer...PM me how much you're looking to get for those M90 parts, intake and all. I'm just curious more than anything, the NA motor is running perfectly and I need to shoot myself in the foot somehow.
#34
Rennlist Member
The centrifugal superchargers look like a great idea, but you have to remember that they're not positive displacement. You won't have boost off the line.
Spencer...PM me how much you're looking to get for those M90 parts, intake and all. I'm just curious more than anything, the NA motor is running perfectly and I need to shoot myself in the foot somehow.
Spencer...PM me how much you're looking to get for those M90 parts, intake and all. I'm just curious more than anything, the NA motor is running perfectly and I need to shoot myself in the foot somehow.
#35
Rainman
Rennlist Member
Rennlist Member
i get that, completely.
a PD blower with just enough throttle will be adding some boost (depending on how your bypass is setup) to get you going easier...
different strokes for different folks though, i can get the appeal of the centri style if you've got a car with sufficient low-end (968) but it's not what i want for my car.
#36
Instructor
So I thought I would share my bracket design, I welcome any feedback as it's yet untested.
It's just sitting on the engine as a mock up, I have yet to sort out a belt tensioner if anyone has a good solution?
It's just sitting on the engine as a mock up, I have yet to sort out a belt tensioner if anyone has a good solution?
#38
Instructor
So here is the belt tensioner, or rather idler as tension will be applied via the stock alternator tensioner.
Rather conveniently the alternator pivot bolt is in a great location to provide a mounting spot that will ensure plenty of belt wrap on the supercharger pulley.
Rather conveniently the alternator pivot bolt is in a great location to provide a mounting spot that will ensure plenty of belt wrap on the supercharger pulley.
#39
Dammmm I wish I knew how to weld..
Dammmm I wish I knew how to weld....
Any chance of you sharing dimensions and drawings??
Any chance of you sharing dimensions and drawings??
#40
Rennlist Member
With all that, I must comment on the beauty of the alternator mount..looks like it was CNC'd. Nice welds too...perhaps it's just an optical illusion, but does the blower belt line up with the other pulleys well? Looks like the blower is set too far forward in it's relation to the other pulleys..?? No Gilmer timing belts here..LOL!
#43
Rennlist Member
Blower choice isn't a big deal to me, I don't have one at all. I wasn't really planning on any more performance projects for this car until my 951 is on the road, but if the price is right...supercharging was my original plan until the 951 sort of fell into my lap.
And yeah, I'm game to split shipping.
And yeah, I'm game to split shipping.
#45
So here is the belt tensioner, or rather idler as tension will be applied via the stock alternator tensioner.
Rather conveniently the alternator pivot bolt is in a great location to provide a mounting spot that will ensure plenty of belt wrap on the supercharger pulley.
Rather conveniently the alternator pivot bolt is in a great location to provide a mounting spot that will ensure plenty of belt wrap on the supercharger pulley.